I know, shame they didn't take the idea too! Both are actually named after a dreadnought pattern from 1st edition 40K, an assault variant with built in jump-jets, so mine's more faithful to the original

they're jump-jets, but yeah, in model-making terms, they serve as a counterbalance. This one was actually made with a lot of metal dreadnought parts, with newer plastic ones, it'd be much easier to balance.